Master Cylinder

When adding fluid to the brake master cylinder reservoir, use only Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. The use of any type of fluid other than the recommended type of brake fluid, may cause contamination which could result in damage to the internal rubber seals and/or rubber linings of hydraulic brake system components.

Secure the mounting flange of the brake master cylinder in a bench vise so that the rear of the primary piston is accessible.

Remove the master cylinder reservoir cap and diaphragm.

Install suitable fittings to the master cylinder ports that match the type of flare seat required and also provide for hose attachment.

Install transparent hoses to the fittings installed to the master cylinder ports, then route the hoses into the master cylinder reservoir.